X-Git-Url: http://git.ithinksw.org/philo.git/blobdiff_plain/54b897cf7eb8b3840b7b53d355d6db6462002b28..5da36a259abcc9fb76b736fc360560f0ff931640:/philo/models/nodes.py diff --git a/philo/models/nodes.py b/philo/models/nodes.py index a9b77fb..5b8b8ed 100644 --- a/philo/models/nodes.py +++ b/philo/models/nodes.py @@ -1,4 +1,6 @@ from inspect import getargspec +import mimetypes +from os.path import basename from django.contrib.contenttypes import generic from django.contrib.contenttypes.models import ContentType @@ -8,26 +10,29 @@ from django.core.servers.basehttp import FileWrapper from django.core.urlresolvers import resolve, clear_url_caches, reverse, NoReverseMatch from django.db import models from django.http import HttpResponse, HttpResponseServerError, HttpResponseRedirect, Http404 -from django.template import add_to_builtins as register_templatetags from django.utils.encoding import smart_str from philo.exceptions import MIDDLEWARE_NOT_CONFIGURED, ViewCanNotProvideSubpath, ViewDoesNotProvideSubpaths -from philo.models.base import TreeEntity, Entity, QuerySetMapper, register_value_model +from philo.models.base import SlugTreeEntity, Entity, register_value_model from philo.models.fields import JSONField from philo.utils import ContentTypeSubclassLimiter +from philo.utils.entities import LazyPassthroughAttributeMapper from philo.signals import view_about_to_render, view_finished_rendering +__all__ = ('Node', 'View', 'MultiView', 'Redirect', 'File') + + _view_content_type_limiter = ContentTypeSubclassLimiter(None) -class Node(TreeEntity): +class Node(SlugTreeEntity): """ :class:`Node`\ s are the basic building blocks of a website using Philo. They define the URL hierarchy and connect each URL to a :class:`View` subclass instance which is used to generate an HttpResponse. """ - view_content_type = models.ForeignKey(ContentType, related_name='node_view_set', limit_choices_to=_view_content_type_limiter) - view_object_id = models.PositiveIntegerField() + view_content_type = models.ForeignKey(ContentType, related_name='node_view_set', limit_choices_to=_view_content_type_limiter, blank=True, null=True) + view_object_id = models.PositiveIntegerField(blank=True, null=True) #: :class:`GenericForeignKey` to a non-abstract subclass of :class:`View` view = generic.GenericForeignKey('view_content_type', 'view_object_id') @@ -39,11 +44,15 @@ class Node(TreeEntity): return False def handles_subpath(self, subpath): - return self.view.handles_subpath(subpath) + if self.view: + return self.view.handles_subpath(subpath) + return False def render_to_response(self, request, extra_context=None): """This is a shortcut method for :meth:`View.render_to_response`""" - return self.view.render_to_response(request, extra_context) + if self.view: + return self.view.render_to_response(request, extra_context) + raise Http404 def get_absolute_url(self, request=None, with_domain=False, secure=False): """ @@ -101,7 +110,7 @@ class Node(TreeEntity): return '%s%s%s%s' % (domain, root_url, path, subpath) - class Meta: + class Meta(SlugTreeEntity.Meta): app_label = 'philo' @@ -170,12 +179,12 @@ class View(Entity): """ raise NotImplementedError("View subclasses must implement get_reverse_params to support subpaths.") - def attributes_with_node(self, node): + def attributes_with_node(self, node, mapper=LazyPassthroughAttributeMapper): """ - Returns a :class:`~philo.models.base.QuerySetMapper` using the :class:`Node`'s attributes as a passthrough. + Returns a :class:`LazyPassthroughAttributeMapper` which can be used to directly retrieve the values of :class:`Attribute`\ s related to the :class:`View`, falling back on the :class:`Attribute`\ s of the passed-in :class:`Node` and its ancestors. """ - return QuerySetMapper(self.attribute_set, passthrough=node.attributes) + return mapper((self, node)) def render_to_response(self, request, extra_context=None): """ @@ -232,7 +241,7 @@ class MultiView(View): """ clear_url_caches() - subpath = request.node.subpath + subpath = request.node._subpath view, args, kwargs = resolve(subpath, urlconf=self) view_args = getargspec(view) if extra_context is not None and ('extra_context' in view_args[0] or view_args[2] is not None): @@ -288,7 +297,7 @@ class MultiView(View): class TargetURLModel(models.Model): """An abstract parent class for models which deal in targeting a url.""" - #: An optional :class:`ForeignKey` to a :class:`Node`. If provided, that node will be used as the basis for the redirect. + #: An optional :class:`ForeignKey` to a :class:`.Node`. If provided, that node will be used as the basis for the redirect. target_node = models.ForeignKey(Node, blank=True, null=True, related_name="%(app_label)s_%(class)s_related") #: A :class:`CharField` which may contain an absolute or relative URL, or the name of a node's subpath. url_or_subpath = models.CharField(max_length=200, blank=True, help_text="Point to this url or, if a node is defined and accepts subpaths, this subpath of the node.") @@ -367,24 +376,32 @@ class Redirect(TargetURLModel, View): class File(View): """Stores an arbitrary file.""" - #: Defines the mimetype of the uploaded file. This will not be validated. - mimetype = models.CharField(max_length=255) + #: The name of the uploaded file. This is meant for finding the file again later, not for display. + name = models.CharField(max_length=255) + #: Defines the mimetype of the uploaded file. This will not be validated. If no mimetype is provided, it will be automatically generated based on the filename. + mimetype = models.CharField(max_length=255, blank=True) #: Contains the uploaded file. Files are uploaded to ``philo/files/%Y/%m/%d``. file = models.FileField(upload_to='philo/files/%Y/%m/%d') + def clean(self): + if not self.mimetype: + self.mimetype = mimetypes.guess_type(self.file.name, strict=False)[0] + if self.mimetype is None: + raise ValidationError("Unknown file type.") + def actually_render_to_response(self, request, extra_context=None): wrapper = FileWrapper(self.file) response = HttpResponse(wrapper, content_type=self.mimetype) response['Content-Length'] = self.file.size + response['Content-Disposition'] = "inline; filename=%s" % basename(self.file.name) return response class Meta: app_label = 'philo' def __unicode__(self): - """Returns the path of the uploaded file.""" - return self.file.name + """Returns the value of :attr:`File.name`.""" + return self.name -register_templatetags('philo.templatetags.nodes') register_value_model(Node) \ No newline at end of file